RT Journal Article SR Electronic T1 New Methods of Examining Gamma Camera Collimators JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 676 OP 683 VO 29 IS 5 A1 Wei Chang A1 Shuqiang Li A1 John J. Williams A1 Philip M. Bruch A1 Carl A. Wesolowski A1 James C. Ehrhardt A1 Peter T. Kirchner YR 1988 UL http://jnm.snmjournals.org/content/29/5/676.abstract AB